Apparatus for preparing stereotype-matrices.



J.P.BLA ND. APPARATUS FOR PREPARING STERBOTYPE MATRICES.

APPLICATION FILED JAN.13, 1909.

Patented Oct. 8, 1912.

2 SHEETS-SHEET 1.

J. P. BLAND. APPARATUS FOR PREPARING STBREOTYPE MATRICES. APPLIOATIONFILED JAN. 13, 1009.

1,040,861. Patented Oct. 8, 1912 2 sEEnTs-sRnnT 2.

.formity of the JOHN PARKINSON BLAND,

F GLAPHAM, ENGLAND.

APPARATUS FOR PREPARING STEREOTYPE-MATRICES.

Specification of Letters Patent.

Patented Oct. 8, 1912.

Application filed January 13, 1909. Serial No. 472,025.

To all whom it may concern:

Be it known that I, JOHN PARKINSON BLAND, a citizen of the UnitedStates, residing at 32 Atherfold road, Clapham, in the county of Surrey,England, have invented a certain new and useful Improvement in Ap- Tparatus for Preparing Stereotype-lilatrices, of which the following is aspecification.

This invention relates to improvements in apparatus for preparingstereotype matrices, and has for its object toprovide a new and improvedapparatus of this description.

The invention is illustrated in the accompanying drawings, wherein-Figure 1 is a side elevation of a machine embodying the invention; Fig.2 is a plan view of the machine shown in Fig. 1; Fig. 3 is a sectionalview through the abrasing cylinder of the machine.

Like numerals refer to like parts through- .out the several figures.

The usual method of making stereotype plates consists in laying a moistpaper matthe plate is to be made and beating this paper mat down with abrush or by applying pressure upon it by rollers, or in an other desiredmanner. When the impressions are made, heat is applied and the moistpaper mat is baked dry and becomes the matrix. It is of great importancethat the impression of the type or blocks in the matrix be uniform indepth, as the uniprinting surface depends upon this condition. The depthof the impressions produced by heating or rolling is not the same onbroad faced type as on narrow faced type, and is not the same on line orhalf-tone blocks as on broad faced type. This is due to the fact thatwhere the pressure from the brush or roller is opposed .to a broad flatsurface the resistance to the formation of the impression is muchgreater than Where the same pressure is applied to a narrow face likesmall type and rolls, etc. It will therefore be seen that when thebeating or rolling is completed the back or blank side of the matrix isnot a true lane, but consists of irregular ridges and depressions due tothe varying depth of the impressions produced by the type.

on the face of the type or blocks from which 'l/Vhen the matrix is putinto the casting box and the metal is poured in, the weight of suchmetal forces the matrix back against the true surface of the castingbox, and the depressed portions of the back of the matrix are alsoforced against the surface of the casting boxmaking this back surface atrue surface. The irregularities of the back or blank'side of the matrixare also transferred to the type side, and the type side thereforebecomes distorted and the impressions from the printing surface aredistorted and irregular.

One of the objects of this invention is to remedy this evil.

Referring now to the drawings, which illustrate one form of apparatusfor acting upon the matrices, there is mounted upon the frame 1 and inthe bearings 2 thereon a cylindrical part or mandrel .3 with its axis atan angle to the longitudinal center line of the frame. The part ormandrel 3 is formed so as to act upon the plane surface of the matricesas by being provided with blades, or coated with some abrasive materialsuch as glass, emery or the like. A cylindrical shield at partlysurrounds .the mandrel. A cover 5 forms a dust chamber through theopening in the top of which the dust is carried off by a suction fan .5.A series of rollers 6, 7, 8 and 9 are supported by bridge supportingdevices, 10, and the brackets or supports 11.

A sliding table 12 is mounted on the frame 1 and is arranged so as to bemoved back and forth. Any suitable mechanism for this purpose may beused. As herein shown this movement is secured by the hand-wheel 13 onthe shaft of which is the pinion 14 engaging a rack 15 connected withthe table. The mandrel 3 'is located above the table, and some suitablemeans is provided for varying the distance between the table and themandrel. As herein shown the table is supported upon a wedge-shapedsupport or slide 16 which rests upon inclined gulde ways 16 on theframe. Some means is provided for moving the wedge-shaped support alongthese ways. The hand wheel 13, pinion 14 and shaft upon which it iscarried are mounted upon the wedge-shaped slide 16. Any suitable meansfor this purpose may be used. As herein shown this movement is providedby means of a hand-wheel 17 connected with the screw 18 working in thebearing 19 and engaging the nut or screwthreaded lug 20 on thewedge-shaped sllde 16. It will thus be seen that by moving the tableback and forth the distance between it and the part 3 which acts uponthe :mmtrices may be varied, so as to permit matrices ahrft of differentthiclmesses to be acted upon. The mandrel 3 may be rotated in anydesired manner, as by means of the belt pulley 21 mounted on the shaftthereof.

The use and operation of my invention are as follows: Before the matrixisplaced in the machine the table is adjusted by means of the hand-wheel17 so as to provide the proper distance between the part 3 and thetable, then the form with the matrix still upon it is placed upon thetable with the back of the matrix up. The abrasing device or mandrel 3is rotated at a high rate of speed. The table is. then moved by means ofthe'hand-Wheel 13 and the matrix passed under the abrasing device, suchabrasing device smoothing up the back of the matrix and making it a trueplaneso that when placed in the mold there will be no irregularities orerrors in the stereotype formed from it. The oblique disposition of thecutting or abrasing part 3 permits a very favorable disposition of theholding-down rolls 6, 7, 8 and 9 and also facilitates the truing up ofthe matrix as the resistance offered is diminished while the risk oftearing the material of which the matrix is composed is avoided.

I claim:

1. A machine for truing up matrices comprising a movable table uponwhich the matrices are supported, a part which acts upon the matrices,said part supported in an oblique position above the matrices, ob liquebridge supports, means for moving said movable table so as to move thematrices past said part, and a roller at each side of said part andadapted to engage the matrices, said rollers supported at one end bysaid oblique bridgev supports.

2. A machine for truing up matrices comprising a reciprocating tableupon which the matrices are supported, a part which acts upon thematrices, said part supported in an oblique position above the matrices,a series of separated independent rollers of different lengths supportedabove said table, means for moving said'reciprocating table so as tomove the' matrices past said part, and means for varying the distancebetween said part and said table.

3. A machine for truing up matrices comprising a frame, a sliding tablemounted thereon, an abrasing device mounted on said frame above saidtable and set at an angle with the line of, direction of travel of thetable, a series of separatedrollers of different lengths mounted abovesaid table and set at an angle to said abrasing device, means for movingsaid table to and from said abrasing device so as to vary the dis-.dinally, and an abrasing tance between them, and means for moving saidtable longitudinally.

4. A machine for truing up matrices comprising a frame, a sliding tablemounted thereon, an abrasing device mounted on said frame above saidtable and set at an angle with the line of direction of travel of thetable, a wedge-shaped support upon which said table is slidably carried,inclined guideways for said support, an actuating part mounted upon saidWedge-shaped support and operatively connected with said sliding tableso as to move it longitudinally, and means for moving the support alongsaid guide-ways to raise and lower the table.

5. A machine for truing up matrices comprising a frame, a wedge-shapedsupport extending across said frame, a sliding table mounted thereon, anactuating part mounted upon said wed ge-shaped support and operativelyconnected with said sliding table so as to move it longitudinally, anabrasing device mounted on said frame above said table and set at anangle with the line of direction of travel of the table, a casing forsaid abrasing device arranged so as to form a dust chamber, and adust-Withdrawing device connected with the dust chamber.

6. A machine for truing up matrices comprising a frame, a sliding tablecarried thereon, an abrasing cylinder supported in an oblique positionacross said table and above the same, oblique bridge supports at eachside of'said abrasing cylinder, a roller on each side of said abrasingcylinder, one end of the roller supported upon said bridge supports.

7. A machine for truing up matrices comprising a frame, a sliding tablecarried thereon, anabrasing' cylinder supported in an oblique positionacross said table and above the same, oblique bridge supports at eachside of said abrasing cylinder, a plurality of rollers extending partway across the table and having their inner ends connected with thebridge supports. i

8. A machine for truing up matrices, comprising a movable table uponwhich the matrices are supported, a supporting frame, a wedge-shapedposed between the frame and the table and adapted when moved to raiseand lower the table, an actuatingdevice mounted on the wedge-shaped partand operatively connected with said table so as to move it longitudevicemounted .on

said frame above said table. 4

JOHN PARKINSON BLAND.

Witnesses:

. CECIL BURMAN H. D. JAMESON.

CAL now,

supporting device 1nter-

